01 -
Bring a large pot of salted water to a boil. Add linguine and cook until al dente according to package instructions. Reserve 60 millilitres of cooking water, then drain the pasta.
02 -
In a bowl, toss cubed chicken with garlic powder, onion powder, smoked paprika, cayenne pepper if using, salt, and black pepper until evenly coated.
03 -
Heat olive oil in a large skillet over medium heat. Arrange chicken pieces in a single layer and sear until golden brown and thoroughly cooked. Transfer chicken to a plate and set aside.
04 -
In the same skillet over medium-low heat, melt butter. Add chicken broth, heavy cream, Dijon mustard, and red pepper flakes if desired. Scrape up any browned bits and stir until homogenous.
05 -
Simmer for several minutes until sauce thickens slightly, stirring occasionally.
06 -
Return seared chicken to the sauce. Add cooked linguine and gently toss to coat evenly in the sauce.
07 -
Stir in Parmesan cheese, chopped parsley, and lemon juice. Toss again until sauce is creamy and all components are well combined.
08 -
If needed, gradually add reserved pasta water, one spoonful at a time, until desired sauce thickness is achieved.
09 -
Serve immediately. Garnish with additional parsley and Parmesan cheese as desired.